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<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
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    <script>
           class Person{
            constructor(name,age){
                this.name=name;
                this.age=age;
            }
        }
        let xiaoming = new Person()
        console.log(xiaoming.__proto__)
        console.log(xiaoming.__proto__.__proto__)

    </script>
</body>
</html>